CNN: Sen. Dodd to retire, sources tell CNN
Sen. Chris Dodd, D-Connecticut, plans to announce his retirement, two sources close to the lawmaker told CNN. A news conference is planned for Wednesday to announce the decision, one of the sources said.

CNN: Obama: 'System failed' in a major way
President Obama said Tuesday that U.S. intelligence has had considerable success, but that the botched Christmas Day attack shows "the system has failed" in a major way.

New York Times: Harold Ford Jr. Weighs a Challenge to Gillibrand
Encouraged by a group of influential New York Democrats, Harold Ford Jr., the former congressman from Tennessee, is weighing a bid to unseat Senator Kirsten E. Gillibrand in this fall’s Democratic primary, according to three people who have spoken with him.

Attleboro Sun Chronicle: US Senate candidates spar in debate
U.S. Senate candidate Scott Brown compared himself to the late President John Kennedy in a debate Tuesday, while his Democratic opponent said he is more like George W. Bush and Dick Cheney. Brown, a state senator from Wrentham, said he ran television advertisements in which an image of Kennedy morphed into him to show that although they are from different eras and different parties, he and Kennedy agree on lowering taxes.

New York Times: U.S. Saw a Path to Qaeda Chiefs Before Bombing
Before detonating a suicide bomb in Afghanistan last week, a Jordanian militant was considered by American spy agencies to be the most promising informant in years about the whereabouts of Al Qaeda’s top leaders, including Ayman al-Zawahri, the terrorist group’s second-ranking operative.

New York Times: Iran Shielding Its Nuclear Efforts in Maze of Tunnels
Last September, when Iran’s uranium enrichment plant buried inside a mountain near the holy city of Qum was revealed, the episode cast light on a wider pattern: Over the past decade, Iran has quietly hidden an increasingly large part of its atomic complex in networks of tunnels and bunkers across the country.

CNNMoney: 3-D TV coming soon to your living room
Both ESPN and Discovery Communications announced Tuesday that they will launch 3-D TV networks. ESPN will start airing its 3-D sports network in June, while Discovery Communications did not specify when it would begin airing 3-D content.